and in-band tone. It must match configuration on the
device side.
In-band DTMF mode consumes the limited DSP
resource when using a highly compressed codec,
such as G.729 or G.723.1. Therefore, calls will not
connect with such setting if DSP is not installed.
Although using a low-complexity codec such as
G.711 does not require DSP, DTMF detection still
takes considerable CPU resource and impacts
several system specs. Be cautious when
configuring an extension with in-band DTMF
mode.
Advanced Settings
Select to see more optional settings shown below.
Selective Call Blocking
Select Block Anonymous Calls to block all calls without
a Caller ID.
Block one or more calling numbers by entering the
calling numbers and clicking
. Removing the
blocked numbers by clicking the number from the list,
and then click
.
Block SIP redirection from the
extension
Select to ignore the forward settings of IP phone and
honor the forward settings of IP PBX.
Forward Options
Select Unconditional Call Forward and clicks a default
destination in the list, e.g. Voicemail or Phone Number.
If selecting Phone Number, enter a number to
which incoming calls are forwarded
unconditionally. The number could be an
extension or a PSTN number with appropriate
outbound prefix.
Unavailable Call Forward
Enter a number to which incoming calls are forwarded
when not answered. The number could be an extension
or a PSTN number with appropriate outbound prefix.
Timeout To Next Forward
Enter a period of time in seconds for ringing the
extension in Unavailable Call Forward. Click
to
add the extension in Unavailable Call Forward and the
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